We do not recommend this method. In general, any small seeds that you would sow directly into your media-based aquaponics system run the risk of being carried away by the flow of your water through the pipes. We have found that larger seeds that you would directly sow in soil (for example, beans, peas, cucumbers) don’t germinate as well within the media bed. For germinating your seeds in the media bed, we recommend using starter plugs such as Rapid Rooter, Rockwool, or coco coir plugs. Ensure that the water level within the bed is high enough to reach the starter plug.